3x+5=-2x+21

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Solution for 3x+5=-2x+21 equation: 



3x+5=-2x+21

We move all terms to the left:

3x+5-(-2x+21)=0

We get rid of parentheses

3x+2x-21+5=0

We add all the numbers together, and all the variables

5x-16=0

We move all terms containing x to the left, all other terms to the right

5x=16

x=16/5

x=3+1/5

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